Hi,
I have been using V3.0.7 of the ESP32 code for a while. I have a (not VM related) problem so I'm updating to see if it is fixed.

I tried updating directly to the latest 3.1.3 but when I build I get various failures - it seems sdkconfig doesn´t exist ? (log attached). 


I installed V3.1.0 and when I built it threw an error.
I have a library #include <HeartBeat.h> from https://github.com/RobTillaart/Arduino/tree/master/libraries/HeartBeat
The compiler threw an error as it was picking up a BLE header called heartbeat.h - I have Local files override library files enabled.
I recreated it in my project and then it compiled.

I then updated to 3.1.1, this is ok and compiles.

I then updated to 3.1.2 and get the same errors as per the upgrade to 3.1.3 (as in the attached file but here for reference).

So I'm back to 3.1.1 at the moment.

C:\Users\nigel\AppData\Local\Temp\VMBuilds\Webbie\esp32_esp32\Release>COPY /y idf-release_v5.3-489d7a2b-v1\esp32\sdkconfig" "
The system cannot find the file specified.
Error running platform build action hooks.prebuild

		Pre-build discovered additional source: uild_opt.h'

Deep search for libraries ...
ensa-esp32-elf-g++" -c \idf-release_v5.3-489d7a2b-v1\esp32/flags/cpp_flags" -w -Os -Werror=return-type -w -x c++ -E -CC   -DF_CPU=240000000L -DARDUINO=108010 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 "-DARDUINO_BOARD=\"ESP32_DEV\"" "-DARDUINO_VARIANT=\"esp32\"" -DARDUINO_PARTITION_min_spiffs "-DARDUINO_HOST_OS=\"windows\"" ault,fsupload=littlefs\"" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=0 -DARDUINO_USB_CDC_ON_BOOT=0 \idf-release_v5.3-489d7a2b-v1\esp32/flags/defines" "-IC:\Arduino\Avionics\Webbie" -iprefix idf-release_v5.3-489d7a2b-v1\esp32/include/" \idf-release_v5.3-489d7a2b-v1\esp32/flags/includes" s\idf-release_v5.3-489d7a2b-v1\esp32/dio_qspi/include" res\esp32" riants\esp32" t.h" s" p" -o "nul"
ensa-esp32-elf-g++" -c \idf-release_v5.3-489d7a2b-v1\esp32/flags/cpp_flags" -w -Os -Werror=return-type -w -x c++ -E -CC   -DF_CPU=240000000L -DARDUINO=108010 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 "-DARDUINO_BOARD=\"ESP32_DEV\"" "-DARDUINO_VARIANT=\"esp32\"" -DARDUINO_PARTITION_min_spiffs "-DARDUINO_HOST_OS=\"windows\"" ault,fsupload=littlefs\"" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=0 -DARDUINO_USB_CDC_ON_BOOT=0 \idf-release_v5.3-489d7a2b-v1\esp32/flags/defines" "-IC:\Arduino\Avionics\Webbie" -iprefix idf-release_v5.3-489d7a2b-v1\esp32/include/" \idf-release_v5.3-489d7a2b-v1\esp32/flags/includes" s\idf-release_v5.3-489d7a2b-v1\esp32/dio_qspi/include" res\esp32" riants\esp32" t.h" s" p" -o "nul"

xtensa-esp-elf-g++.exe*: fatal error: cannot specify -o with -c, -S or -E with multiple files


	An error was encountered during the 'Deep Search' library discovery process.
Library Include Paths (9)
Include Path aries\SD\src'
 

HeartBeat Compiler Error:
Investigating this further the issue is down to how Deep Search works in both vMicro and Arduino IDE coupled with Windows case-insensitivity.

The "heartbeat.h" from the ESP32 core will be found by the compiler when it scans the INO file as the core include path is already on the command, therefore it does not try to resolve the library which contains "Heartbeat.h".  If Windows was case sensitive the different casing would differentiate these files, however it is not by default (and causes other issues if applied).

This file was added in the ESP32 core v3.1.0 (as part of the esp32-arduino-libs version idf-release_v5.3-083aad99-v2) and onwards, and the only solutions are to have the file present in the project as you have (so the Local Files Override Library Files applies), or to use an older board package.

Thanks for the detail, we will continue testing through this and update when we have a concrete root cause.

I suspect it may be a "path too long" type issue, however need to ensure this is the case and investigate further.